*HEADING
ECA4AFE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [ACAX4]
*NODE, Nset=ODB_NSET
  1,0
  5,0    ,0.1120
 41,0.113,0
 45,0.113,0.1120
 61,0.123,0
 65,0.123,0.1120
101,0.236,0.
105,0.236,0.1120
*NGEN,NSET=LEFT
  1,  5
*NGEN,NSET=RIGHT
101,105
*NGEN,NSET=BOT
  1, 41,10
 41, 61,10
 61,101,10
*NGEN,NSET=TOP
  5, 45,10
 45, 65,10
 65,105,10
*NGEN, Nset=ODB_NSET
 11, 15
 21, 25
 31, 35
 41, 45
 51, 55
 61, 65
 71, 75
 81, 85
 91, 95
101,105
*ELEMENT,TYPE=ACAX4,ELSET=ALL
 1,  1, 21, 23, 3
*SOLID SECTION,MATERIAL=ALL,ELSET=ALL
1,
*MATERIAL,NAME=ALL
*DENSITY
 1.,
*ACOUSTIC MEDIUM,BULK MODULUS
1.183E5, 
**
** Sets added by addodb
**
*Elset,Elset=ODB_ESET
ALL,
**
**
*Nset, Nset=ODB_NSET
ODB_NSET, LEFT, RIGHT, BOT
TOP, 
**
**
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
5, , ,-1.E7 
*OUTPUT,FIELD,VARIABLE=PRESELECT,OP=ADD,FREQUENCY=9999
*OUTPUT,FIELD, OP=ADD
*MODAL OUTPUT,VARIABLE=ALL
*OUTPUT,HISTORY,OP=ADD
*MODAL OUTPUT,VARIABLE=ALL
*ENDSTEP